Device for supporting and moving a lens in the operation of beveling the same



May 8, 1951 M. sUBEN 2,551,648

` DEVICE FOR POR G AND MOVING A LENS IN THE OPE ION BEVELING THE SAME Filed Dec. 4, 1948 26 57 v 45 5;, 52 2Q 44\4! 5k- 0 /47 24 /4/4/ 5o 24 45 44, /44 /55\ Q6 J2 Y W l Q\ e5 5 WIN l 48 9 25 W55 H1249; Q

INVENTOR MORTEN SUBEN ATTORNEY Fig. l of the drawing, the part I is actually in the form of a long relatively thin member having the pivot bearing portion I2 projecting from the inner surface thereof, whereas the part II is relatively thick. The part I I is recessed in the irregular fashion clearly seen at 36, in Fig` 1 of the drawing to receive a supplemental part Il', the latter operating as a retaining plate to hold the several devices in the part Il, as later described. rhe cutout as at 36 is such as to strike centers of certain bores or apertures and is of sufficient depth to meet the center of the axis of a shaft 31, as clearly seen in Fig. 2 of the drawmg.

At one end of the shaft 31 is secured a bevelled gear 38 which seats and operates in a cutout or recessed portion 39, in the part II, as well as the part Il. To the other end of the shaft Il is secured a pinion 46, Also arranged between the parts II-I I is a stub shaft 4I, on which is arranged a gear 42 which meshes with the pinion 40. On the shaft 4i is a pinion 43 with which a rack bar 44 is adapted to operate, the bar being secured to and movable with a plunger bar 45.

The plunger bar 45 is supported and guided in the parts |I-I I by a pair of pins 45 on which are arranged springs 41. The pins 46 are suitably guided between the parts II--I I or apertures 48 formed between said parts, one of which is indicated at the right of Fig. 2, whereas the parts have large recesses 49 opening through one surface of said parts for the reception of the springs 41 and other large recesses 5t in the part II for reception of adjustable stops I arranged on the threaded ends 52 of said pins. By virtue of this construction, the plunger bar 45 can be manually depressed against the action of the springs 41 in rotation of the shaft 31 and rotation of the grippers 22-23 have at least a complete revolution of the lens or other article 2 I.

A gear ratio will be provided so that the motion of the plunger bar 45 will cause the shaft 31 to rotate at least one revolution, and by slightly reducing the size of the bevelled gear 34 as compared with the gear 33, a greater than one revolution of the workpiece 2l is insured. The purpose of the gearing employed is to minimize the plunger stroke 45 for the performance of the desired function or operation.

At 53 I have shown screws for securing the part Il to the part II. It will be apparent that both parts I I -I I are cutout or recessed for the reception of shafts, gears, pinions and so forth, and when the parts II-II are assembled, the surfaces of these parts will conform one with respect to the other. In this connection and considering Figs. 3 and 4 of the drawing, it will be apparent that the parts II-Il have registering curved outer surfaces, as at 54-54 and the outer surface 55 of the part IG is also curved and this is true of the outer surface 55 of the bar 45. These combined curvatures produce a hand grip portion which will nt comfortably in the hand and facilitate movement of the handle members I1I8 toward each other in separating the grippers 22-23 for insertion and removal of the workpiece 2|, as well as the actuation of the plunger bar 45, the latter being intermittently operated in providing a successive series of rotary operations of the workpiece in bevelling the peripheral edge 2|' thereof, either with a single or double bevel.

Both jaw members have adjacent the pivots 26-21, outwardly curved thumb or ngerpieces 51-58 for applying pressure on the jaw end of 4 the tool in the grinding of the workpiece while the tool is gripped in the other hand. The two thimble-pieces are employed for supporting the tool in the double-bevelling of the peripheral edge of the workpiece as and when this is required.

In a tool of the character described for use in grinding what is generally referred to as lenses, relatively slight movement is required in the spreading of the grippers to facilitate insertion and removal of lenses of diierent thicknesses. It will be understood, however, that where the size of the workpiece may be greater, the tool will be constructed accordingly. It will be further understood, that slight frictional movement of the grippers is desirable from the standpoint of providing a more positive control of rotary operation of the workpiece in the operation of grinding the same. However, a minimum amount of pressure is required on the plunger bar 45 to accomplish this result, and after little experience, an operator can become very efcient in the handling of the tool to provide substantially accurate bevelling of peripheral edges of workpieces of the kind under consideration. It will, of course, be apparent that my improved tool can be utilized to support any type or kind of workpiece in per forming operations thereon, particularly wherein it is desirable to rotate the workpiece in this operation.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is: g

l. A tool for supporting a disc-type workpiece in the operation of shaping peripheral edges thereof, said tool comprising two pivotally coupled parts, each part having a jaw member at one end and a handle member at the opposite end, each jaw member having a rotatable disc, a friction ring supported on the surface of the disc for engaging a workpiece between said members, means on the handle members for normally urging the jaw members into gripping engagement with a workpiece, manually operated means in one of said parts for rotating the discs of the jaw member in rotation of a workpiece supported thereby, said last named means comprising a drive shaft arranged longitudinally in said part and geared to one of said discs, and means including a plunger operated rack mounted in said part for actuating said drive shaft.

2. A tool for supporting a disc-type workpiece in the operation of shaping peripheral edges thereof, said tool comprising two pivotally coupled parts, each part having a jaw member at one end and a handle member at the opposite end, each jaw member having a rotatable disc, a friction ring supported on the surface of the disc for engaging a workpiece between said members, means on the handle members for normally urging the jaw members into gripping engagement with a workpiece, manually operated means in one of said parts for rotating the discs of the jaw member in rotation of a workpiece supported thereby, said last named means comprising a drive shaft arranged longitudinally in said part and geared to one of said discs, means including a plunger operated rack mounted in said part for actuating said drive shaft, and tensional means actuating said rack for rotating the drive shaft in an opposite direction.

3. A tool for Supporting a disc-type workpiece in the operation of shaping peripheral edges thereof, said tool comprising two pivotally coupled parts, each part having a jaw member at one end and a handle member at the opposite end, each jaw member having a rotatable disc, a friction ring supported on the surface of the disc for engaging a workpiece between said members, means on the handle members for normally urging the jaw members into gripping engagement with a workpiece, one of said parts having a drive shaft arranged longitudinally thereof, means gearing one end of the shaft to one of said discs, a plunger actuated rack on said part adjacent the other end of said shaft, and means comprising a plurality of gears arranged in said part for transmitting motion of the rack to said drive shaft in rotating said discs at least a complete revolution.

4. A tool for supporting a disc-type workpiece in the operation of shaping peripheral edges hereof, said tool comprising two pivotally coupied parts, each part having a jaw member at one end and a handle member at the opposite end, each jaw member having a rotatable disc, a friction ring supported on the surface of the disc for engaging a workpiece between said members, means on the handle members for normally urging the jaw members into gripping engagement with a workpiece, one of said parts having a drive shaft arranged longitudinally thereof, means gearing one end of the shaft to one of said discs, a plunger actuated rack on said part adjacent the other end of said shaft, means comprising a plurality of gears arranged in said part for transmitting motion of the rack to said drive shaft in rotating said discs at least a complete revolution, said rack being manually actuated through a bar, and tensional means for moving said bar and rack in one direction.

5. A tool for supporting a disc-type workpiece in the operation of shaping peripheral edges thereof, said tool comprising two pivotally coupled parts, each part having a jaw member at one end and a handle member at the opposite i end, each jaw member having a rotatable disc, a friction ring supported on the surface of the disc for engaging a workpiece between said members, means on the handle members for normally urging the jaw members into gripping engagement with a workpiece, one of said parts having a drive shaft arranged longitudinally thereof, means gearing one end of the shaft to one of said discs, a plunger actuated rack on said part adjacent the other end of said Shaft, means comprising a plurality of gears arranged in said part for transmitting motion of the rack to said drive shaft in rotating said discs at least a complete revolution, said rack being manually actuated through a bar, tensional means for moving said bar and rack in one direction, and a plate detachable with said part to give access to said shaft and gears.

6. A tool for supporting a disc-type workpiece in the operation of shaping peripheral edges thereof, said tool comprising two pivotally coupied parts, each part having a jaw member at one end and a handle member at the opposite end, each jaw member having a rotatable disc, a friction ring supported on the surface of the disc for engaging a workpiece between said members, means on the handle members for normally urging the jaw members into gripping engagement with a workpiece, one of said parts having a drive shaft arranged longitudinally thereof, means gearing one end of the shaft to one of said discs, a plunger` actuated rack on said part adjacent the other end of said shaft, means comprising a plurality of gears arranged in said part for transmitting motion of the rack to said drive shaft in rotating said discs at least a complete revolution, said rack being manually actuated through a bar, tensional means for moving said bar and rack in one direction, a plate detachable with said part to give access to said shaft and gears, and each jaw member having an outwardly curved ngerpiece portion.

7. A tool of the character described, comprising a pair of pivotally coupled elongated and substantially straight handle members, jaws extending beyond the pivot of said handle members in a stra-ight iine, a disc rotatably mounted in each jaw, each disc having a cushioned gripper surface for frictional engagement with a workpiece arranged between said jaws, one handle member and the jaw thereof being thick and having a detachable plate extending longitudinally thereof, a shaft extending longitudinally between the plate and adjacent surface of said handle member and jaw, a gear at one end of the shaft engaging a gear on the disc of said jaw for rotating both discs and the workpiece supported thereby, a gear at the other end of said shaft, a plunger mounted on said handle member at a position substantially to the other thin handle member, means including a rack on said plunger for actuating the last named gear in manually moving said plunger to rotate said shaft in one direction, and tensional means for actuating the plunger to rotate said shaft in the opposite direction.

MORTEN SUBEN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,323,057 Holliday Nov. 25, 1919 1,411,615 Evans Apr. 4, 1922 1,558,167 Herrick Oct. 20, 1925 1,721,161 Maynard July 16, 1929 2,316,109 Soladar Apr. 6, 1943 

